Very interesting report and survey. The arXiv paper link cited,
https://arxiv.org/abs/2104.07739 and abstract states, "We present PHANGS-ALMA, the first survey to map CO J=2-1 line emission at ~1" ~ 100pc spatial resolution from a representative sample of 90 nearby (d<~20 Mpc) galaxies that lie on or near the z=0 "main sequence" of star-forming galaxies. CO line emission traces the bulk distribution of molecular gas, which is the cold, star-forming phase of the interstellar medium. At the resolution achieved by PHANGS-ALMA, each beam reaches the size of a typical individual giant molecular cloud (GMC), so that these data can be used to measure the demographics, life-cycle, and physical state of molecular clouds across the population of galaxies where the majority of stars form at z=0. This paper describes the scientific motivation and background for the survey, sample selection, global properties of the targets, ALMA observations, and characteristics of the delivered ALMA data and derived data products. As the ALMA sample serves as the parent sample for parallel surveys with VLT/MUSE, HST, AstroSat, VLA, and other facilities, we include a detailed discussion of the sample selection. We detail the estimation of galaxy mass, size, star formation rate, CO luminosity, and other properties, compare estimates using different systems and provide best-estimate integrated measurements for each target. We also report the design and execution of the ALMA observations, which combine a Cycle~5 Large Program, a series of smaller programs, and archival observations. Finally, we present the first 1" resolution atlas of CO emission from nearby galaxies and describe the properties and contents of the first PHANGS-ALMA public data release."
1 arcsecond resolution and 20 Mpc distance, a bit farther than 65 million light-years distance. Go ALMA
I found this statement in the space.com interesting.
"To understand how stars form, we need to link the birth of a single star back to its place in the universe. It's like linking a person to their home, neighborhood, city and region. If a galaxy represents a city, then the neighborhood is the spiral arm, the house the star-forming unit, and nearby galaxies are neighboring cities in the region," PHANGS principal investigator Eva Schinnerer, an astronomer at the Max Planck Institute for Astronomy, said in the statement. "These observations have taught us that the 'neighborhood' has small but pronounced effects on where and how many stars are born."
Okay, location, location, location is very important as to where the Sun and Earth formed
When it comes to exoplanet studies, this site shows 4768 exoplanets now,
http://exoplanet.eu/ with 3527 host stars. This site,
https://exoplanetarchive.ipac.caltech.edu/index.html, shows 4422 exoplanets with 3280 host stars. Showing that all the host stars listed were members of various open clusters at their beginning is very challenging to confirm.
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